A Judicial Review? No chance, according to someone in the legal profession somewhere else - probably the long thread on here.
This is a quote from the
Courts & Tribunal Judiciary website:
Judicial review is a type of court proceeding in which a judge reviewsthe lawfulness of a decision or action made by a public body.
The bold is mine.
The LAA is not a Public Body, it is a private Association.
Her threat therefore surely is an empty one. She either knows that, and doesn't care so long as it has an effect, or she is ignorant. Neither are things to be proud of.